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SeaToolsHard Disk Sentinel
Free

Free download from Seagate.

 Freemium

A limited free version exists. The Professional edition is a paid licence.

Windows Windows, Linux
  • Official diagnostic tool from a drive manufacturer
  • Quick health check for hard drives and SSDs
  • Health and estimated lifetime per drive rather than raw S.M.A.R.T. values
  • Sees drives behind many USB enclosures and RAID controllers
  • Aimed mainly at Seagate drives
  • Offers diagnostics rather than repair or recovery
  • The free version is limited; most features need the paid Professional edition
Downloadable app Downloadable app
Closed source Closed source
License: Proprietary License not stated
Not stated if an account is needed Not stated if an account is needed
Not stated if it works offline Not stated if it works offline

Checked September 24, 2026

Checked September 22, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.